AAV Assembled Capsids Are Produced in Cells Blocked From Cell Cycle Progression
Bibliographic record
Abstract
ABSTRACT Adeno‐associated virus (AAV) is a promising delivery system for gene therapy. However, current manufacturing of AAV suffers from very low yields compared to other biotherapeutics. The AAV dose per patient ranges between 10 11 and 10 15 viral genomes (vg), requiring an average of 10 to 30 L production/dose. As a consequence, production costs are prohibitive for most indications. Our recent studies revealed that only 10% of the HEK293 cells that have received the AAV encoding DNA produce assembled AAV capsids. This observation prompts the question: Why would cells that have been successfully transfected, be unable to produce AAV. To answer this question, we undertook a detailed study to characterize the two sub‐populations from the same transfection, the cells that were making assembled capsids and those that were not. We found that the two populations had distinct cell cycle profiles, with a block in cell cycle progression characterizing the producer population. RNA‐seq analysis of the two populations reveals differences in the molecular pathways impacted and provides a basis for making changes to improve productivity.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".